SI5338M-B04405-GM

Overview

The SI5338M-B04405-GM is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology for independent frequency synthesis. It features four output drivers capable of supporting LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL formats with supply voltages of 1.5, 1.8, 2.5, or 3.3 V. The device operates on a single core supply (1.8, 2.5, or 3.3 V) with a typical current of 45 mA. Key electrical parameters include a maximum input frequency of 710 MHz, a maximum output frequency of 710 MHz, and a typical RMS jitter of 0.7 ps. It is housed in a 24-lead QFN package.

Feature Summary

• MultiSynth technology enables zero ppm precision and glitchless frequency adjustments via independent increment/decrement features.
• Supports flexible input references including external crystals (8–30 MHz), CMOS (5–200 MHz), and differential inputs up to 710 MHz.
• Configurable spread spectrum (SSC) allows any frequency from 5 to 350 MHz with modulation rates from 33 to 63 kHz.
• Includes loss of lock and loss of signal alarms with I2C/SMBus compatible programming interface.

Applications

• PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS compliant timing
• Ethernet switch/router and 1 GbE/10 GbE interfaces
• Processor and FPGA clocking systems
• Telecom line cards and MSAN/DSLAM/PON equipment

Procurement Notes

Verify the specific B04405 ordering suffix configuration against the official Skyworks datasheet to ensure correct pin assignments and functional settings. Confirm availability status through authorized distributors as stock levels vary. Ensure ESD protection measures are implemented during handling due to the component's sensitivity ratings.

Selection Notes

Select this model when independent, any-frequency synthesis is required for four outputs with low jitter performance. Verify that the target application supports the available output voltage options (1.5V to 3.3V) and input reference types. Consider the 4x4 mm QFN package dimensions for PCB layout constraints and thermal management requirements within the -40 to +85 °C operating range.

Part Context

This component belongs to the Si5338 family of I2C-programmable clock generators. It is designed to replace multiple crystal oscillators by synthesizing independent frequencies on each driver. The device integrates a phase-locked loop (PLL) and multi-synth stages to achieve high-precision clock generation suitable for high-speed digital interfaces.

Replacement Considerations

Direct replacements must match the 24-QFN package and support similar output formats and frequencies. Consult the Skyworks Cross Reference tool for verified substitutes. Ensure alternative components support I2C programming and comparable jitter specifications if used in PCIe or high-speed serial applications.

FAQ

What is the maximum input frequency supported by the SI5338M?

The device supports a maximum differential input frequency of 710 MHz.

Can the output drivers operate at different supply voltages?

Yes, each output driver can be independently configured for 1.5, 1.8, 2.5, or 3.3 V supply voltages.

Does the device support glitch-free frequency changes?

Yes, it features an independent frequency increment/decrement capability that allows glitchless adjustments in 1 ppm steps.